compass plant definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
- a coarse plant (Silphium laciniatum) of the composite family, with large, bristly leaves and heads of yellow flowers, found on the prairies of central U.S.: the leaves reputedly point in a north-and-south direction
- any of various other plants whose leaves supposedly point to the north and south
compass plant definition by American Heritage Dictionary
A perennial herb (Silphium laciniatum) in the composite family, native to prairie regions of the Midwest United States and having radiate yellow flower heads and erect, basal, pinnately divided leaves.